Security Advisory

CVE-2026-8328

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-05-13 20:14:33

Last updated 2026-05-13 20:21:23

Assigner PSF

State PUBLISHED

Description

The ftpcp() function in Lib/ftplib.py was not updated when CVE-2021-4189 was fixed. While makepasv() was patched to replace server-supplied PASV host addresses with the actual peer address (getpeername()[0]), ftpcp() still calls parse227() directly and passes the raw attacker-controllable IP address and port to target.sendport(). This patch is related to CVE-2021-4189.

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